Structural analysis of chromophore-labeled disaccharides and oligosaccharides by electrospray ionization mass spectrometry and high-performance liquid chromatography/electrospray ionization mass spectrometry

✍ Scribed by Li, D. T.; Her, G. R.

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 296 KB
• Volume: 33
• Category: Article
• ISSN: 1076-5174
• DOI: 10.1002/(sici)1096-9888(199807)33:7<644::aid-jms667>3.0.co;2-f

✦ Synopsis

Disaccharides and linear oligosaccharides were labeled with p-aminobenzoic ethyl ester (ABEE) chromophore and analyzed by negative ion electrospray ionization mass spectrometry (ESIMS). The formation of glycosylamines rather than reductive amination in the labeling reaction produced many characteristic fragment ions under insource collision-induced dissociation (CID). These ions provided unambiguous assignment of the position of the glycosidic linkages. This approach was extended to the analysis of linkages and the sequence of the linkages of several linear oligosaccharides. Additionally, the anomeric conÐguration of ABEE-labeled 1-3-, 1-4-and 1-6linked glucose disaccharides could be di †erentiated according to the relative abundance of characteristic ions. Disaccharides with the same linkage but di †erent monosaccharide compositions could be analyzed by on-line coupling of high-performance liquid chromatography with ESIMS.